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Why do Physicists take multiple readings in experiments?

Taking multiple readings allows for errors (known as anomalous data points) to be spotted.For example if you were to take just one reading in an experiment and this was wrong, there would be no way of tellin...
DS
Answered by Daniel S. • Physics tutor
14939 Views

Describe one method by which the distance to stars from Earth is measured, and one modern improvement to this method which increases its accuracy.

One such method is Stellar parallax. When observing stars in the night sky, stars which are further away from Earth appear to 'move' less across the sky as the earth rotates. Using this, stellar parallax wor...
HH
Answered by Harry H. • Physics tutor
2081 Views

Assuming no friction, describe the motion of a simple pendulum released from rest at t=0 at amplitude A? Provide information about its speed and position at characteristic times during one period. [The 1D equation of motion is described by a cosine]

The displacement of the bob of mass m is given by the equation x(t)=A cos(w*t), with no phase offset as given by the boundary conditions (zero speed at t=0). By differentiating this equation twice the first ...
SA
Answered by Stefan A. • Physics tutor
2180 Views

What’s the difference between mass and weight?

Mass is a measure of how much matter something has in it, measured in Kg, your current mass stays the same no matter where you are.Weight is the measure of the force of gravity acting on an object, measured ...
DQ
Answered by Darcy Q. • Physics tutor
3464 Views

In an isolated container contains 1kg of ice at 0 oC. 1kg of warm water (323K) is poured into the container. How much ice (in kgs) remains after the system returns to thermal equilibrium? (by the end of the process?)

As this is an isolated container, we know that the heat transfer with the environment is zero. Since the specific latent heat of ice is a magnitude bigger than the specific heat of water, the container will ...
AM
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